ECE: Electrical & Computer Engineering
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Page 21 - Chris Anderson examines UWB pulseBradley Fellow Chris Anderson examines an ultrawideband (UWB) pulse in the department’s new multidisciplinary UWB laboratory. Anderson is developing a testbed for evaluating different UWB modulation, multiple access, and coding schemes and that will support raw data rates up to 100 Megabits/second.

Page 21 - Dead cell time lapseAmy Bell is using signal and image processing to de-noise microscope images in a study of how cells react to viruses. She is working with Karen Duca of the Virginia Bioinformatics Institute (VBI).

Page 20 - Multi-antenna, Single-receiver DF systemA prototype of a novel, single-channel, direction-finding (DF) system demonstrates software radio technology that combines a single radio, a switch, and an 8-element circular array to determine the bearing of a signal. Single channel systems would reduce bulk and weight for soldiers in the field, compared to conventional one-receiver-per-antenna DF technology. The system achieves very good accuracy (less than 1º RMS error down to 5dB SNR) with an estimation time of approximately 4ms. The DF algorithm was developed by John Deaveny and Nathan Harter, with faculty advisor Michael Buehrer.

ECE wireless communications researchers have released the world’s first open-source implementation of the defacto industry standard for software radio design. The open-source tool lowers the barriers to entering software radio research and should boost software radio education as well as research innovations, according to industry experts.

Called OSSIE (Open-Source SCA Implementation: Embedded), the MPRG tool is written in C++ and is currently available for the Windows 2000 and Linux platforms with MATLAB® installed. OSSIE is an implementation of the Software Communications Architecture (SCA) developed by the U.S. Department of Defense Joint Tactical Radio Systems (JTRS).

The SCA describes the framework that is used to establish, maintain, and tear down waveforms in a radio system. With much of the software radio research driven by Department of Defense needs, the SCA has become the working standard in the field.

The ability of a software framework that is free, easy to use, and written in a language common to most wireless developers has been a significant barrier to entry into the software-radio research arena.

Under the direction of faculty advisor Jeff Reed, post-doctoral fellow Max Robert led a mostly-volunteer team of students to develop OSSIE.